Multiband whip antenna

a multi-band whip and antenna technology, applied in the direction of resonant antennas, collapsible antennas, waveguides, etc., can solve the problems of matching and radiation pattern problems, the antenna is not readily fabricatable and deployable, and the antenna is provided primarily for voice communications. , to achieve the effect of improving vswr, shortening the antenna effectively, and improving vswr
US20120154236A1Active Publication Date: 2012-06-21BAE SYST INFORMATION & ELECTRONICS SYST INTERGRATION INC
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Patent Information

Authority / Receiving Office
US Β· United States
Current Assignee / Owner
BAE SYST INFORMATION & ELECTRONICS SYST INTERGRATION INC
Publication Date
2012-06-21

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Abstract

A multi-band whip antenna having a 30 MHz to 2 GHz bandwidth and an L-band dipole has its coverage extended up to 6 GHz by eliminating nulls and reducing VSWR problems that are cured through the utilization of a sleeve over the feedpoint of the L-band antenna. Chokes in the form of sleeves are provided at either end of the L-band dipole to shorten the L-band antenna for preventing reverse polarity currents at the L-band antenna feedpoint, with the antenna further including the use of double shielded meanderlines to provide improved performance between 410-512 MHz and in which a capacitance sleeve is added at the bottom of the L-band antenna to effectively elongate the antenna below the L-band to permit operation below 700 MHz.
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Description

RELATED APPLICATIONS

[0001] This is a continuation-in-part of co-pending patent application Ser. No. 12 / 436,375 filed Mar. 6, 2009 entitled Broadband Whip Antenna, the contents of which are incorporated herein by reference. This Application also claims rights under 35 USC Β§119(e) from U.S. application Ser. No. 61 / 420,522 filed Dec. 7, 2010, the contents of which are incorporated herein by reference.FIELD OF THE INVENTION

[0002] This invention relates to broadband communication antennas and more particularly to improvements to a broadband whip antenna which extends continuous coverage from 30 MHz up to above 6 GHz.BACKGROUND OF THE INVENTION

[0003] As discussed in patent application Ser. No. 12 / 436,375 incorporated herein by reference, the military, police and some commercial installations have vehicles that are provided with a virtual forest of antennas to cover various frequency bands. As a result there is a requirement for continuous coverage in a single antenna that operates between fr...

Claims

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